Single-wheeled motorcycle



FIG. 1 is a top plan view of a single-wheeled motorcycle according to our design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a right side elevation view thereof, the left side being a mirror image thereof; and,

FIG. 6 is a front right side perspective view.

Where included, the broken lines showing environment or structure are for illustrative purposes only and form no part of claimed design. 

The ornemental design for a single-wheeled motorcycle, as shown and described. 